Work

Chemical characterization of the Icarus stream progenitor

Year: 2026

Type: article

Abstract: The search for accreted satellites in the Galactic disk is a challenging task, to which Gaia plays a crucial role in synergy with ground-based spectroscopic surveys. In this context, we identified a chemo-dynamical substructure, Icarus, that is consistent with the debris of a LMC-like galaxy accreted onto a primordial disk on an initial prograde low-inclination orbit (Re Fiorentin et al. 2021, 2024). In order to gain deeper insight on the Icarus stream progenitor, we are obtaining accurate abundances to perform an extended analysis in diagnostic chemical spaces such as [(C+N)/O]-[Ni/Fe] as well as [Al/Fe]-[Mg/Mn], [Ba/Mg]-[Mg/H] and [Y/Eu], [Eu/Mg], [Ba/Y] vs [Fe/H]. Here, we present the first results based on HARP@TNG and discuss the ex-situ scenario.

Source: Zenodo (CERN European Organization for Nuclear Research)

DOI: 10.5281/zenodo.18672331

Authors: Spagna, Alessandro, Re Fiorentin, Paola

Institutions: Osservatorio Astrofisico di Torino, National Institute for Astrophysics

Language: English

Topic: Stellar, planetary, and galactic studies

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W7140233992

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